Your son got 95.13 percentile . From this you can calculate his overall rank .

Overall rank is calculated by the formula given below :

(100-your total percentile)X 869010/100

869010 is number of students appeared for JEE mains January exam .

Overall rank of your son using the formula is between 40000-50000.

The last year cutoff for Nirma University was

Mechanical Engineering - 38980

Computer Science and Engineering - 23293

Electrical Engineering - 62201

Chemical Engineering - 68237

Civil Engineering - 89195

He has a very good chance of getting admission in this college.

For detailed cutoff , you can visit the link given below  :

https://engineering.careers360.com/articles/nirma-university-btech-admissions

You can also try our college predictor using the link given below  :

https://engineering.careers360.com/jee-main-college-predictor